paintarea.h

qt-x11-opensource-src-4.1.4.tar.gz源码

/****************************************************************************
**
** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the example classes of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at [e-mail].
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** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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****************************************************************************/

#ifndef PAINTAREA_H
#define PAINTAREA_H

#include <QColor>
#include <QImage>
#include <QPainterPath>
#include <QWidget>

class BrushInterface;

class PaintArea : public QWidget
{
    Q_OBJECT

public:
    PaintArea(QWidget *parent = 0);

    bool openImage(const QString &fileName);
    bool saveImage(const QString &fileName, const char *fileFormat);
    void setImage(const QImage &image);
    void insertShape(const QPainterPath &path);
    void setBrushColor(const QColor &color);
    void setBrushWidth(int width);
    void setBrush(BrushInterface *brushInterface, const QString &brush);

    QImage image() const { return theImage; }
    QColor brushColor() const { return color; }
    int brushWidth() const { return thickness; }
    QSize sizeHint() const;

protected:
    void paintEvent(QPaintEvent *event);
    void mousePressEvent(QMouseEvent *event);
    void mouseMoveEvent(QMouseEvent *event);
    void mouseReleaseEvent(QMouseEvent *event);

private:
    void setupPainter(QPainter &painter);

    QImage theImage;
    QColor color;
    int thickness;

    BrushInterface *brushInterface;
    QString brush;
    QPoint lastPos;

    QPainterPath pendingPath;
};

#endif